19872147103 has 4 divisors (see below), whose sum is σ = 19877623648. Its totient is φ = 19866670560.

The previous prime is 19872147091. The next prime is 19872147143. The reversal of 19872147103 is 30174127891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19872147103 - 2¹³ = 19872138911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19872147103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19872147143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2732826 + ... + 2740087.

It is an arithmetic number, because the mean of its divisors is an integer number (4969405912).

Almost surely, 2^19872147103 is an apocalyptic number.

19872147103 is a deficient number, since it is larger than the sum of its proper divisors (5476545).

19872147103 is an equidigital number, since it uses as much as digits as its factorization.

19872147103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476544.

The product of its (nonzero) digits is 84672, while the sum is 43.

The spelling of 19872147103 in words is "nineteen billion, eight hundred seventy-two million, one hundred forty-seven thousand, one hundred three".